INTRODUCTION
Note. For a tutorial on how to interprete injector waveforms, see WAVEFORMS - INJECTOR PATTERN TUTORIAL found in the GENERAL/GENERAL INFORMATION section.
Note. To see a list of the other year/make/models these waveform(s) apply to, go to the top of the article.
Quick Hyperlinks
- (Scheme 646)for the waveform.
- See the «WAVEFORM DATA TABLE #1»(/chevrolet/chevy-van-g3500/1985-1999/remont/testing-diagnostics/#fuel-injector-waveforms-43l-cpi-vin-w) for supporting data.
The Waveform Data Table is listed first. This table contains supporting information about the waveform illustration and should be used in conjunction with it.
The waveform illustration follows after the table.
Note. A description of the vehicle the waveform came from is not available.
| Application | Specification |
|---|---|
| Pattern Type | Voltage |
| Voltage Base | 20 Volts |
| Time Base | 1 Millisecond |
| Oscilloscope Used | Unknown |
| Pattern Represents | Single Injector |
| Injector Driver Type | Current Controlled |
| Side of Circuit That Driver Switches | Ground |
| Injector On-Time Shown | 2.22 mS |
| Conditions | Hot Idle, No Load, Open Loop |
| Cursors On-Screen | Yes |
| Cursors Are Measuring | Injector On-Time |
| Status | Known Good Pattern |
WAVEFORM DATA #1
Injector Waveform (Voltage) - Cursors Used - Known Good. Scheme 646
- (Scheme 647)for the waveform.
- See the «WAVEFORM DATA TABLE #2»(/chevrolet/chevy-van-g3500/1985-1999/remont/testing-diagnostics/#fuel-injector-waveforms-43l-cpi-vin-w) for supporting data.
The Waveform Data Table is listed first. This table contains supporting information about the waveform illustration and should be used in conjunction with it.
The waveform illustration follows after the table.
Note. A description of the vehicle the waveform came from is not available.
| Application | Specification |
|---|---|
| Pattern Type | Voltage |
| Voltage Base | 20 Volts |
| Time Base | 1 Millisecond |
| Oscilloscope Used | Unknown |
| Pattern Represents | Single Injector |
| Injector Driver Type | Current Controlled |
| Side of Circuit That Driver Switches | Ground |
| Injector On-Time Shown | 2.02 mS |
| Conditions | Hot Idle, No Load, Closed Loop |
| Cursors On-Screen | Yes |
| Cursors Are Measuring | Injector On-Time |
| Status | Known Good Pattern |
WAVEFORM DATA #2
Injector Waveform (Voltage) - Cursors Used - Known Good. Scheme 647
- (Scheme 648)for the waveform.
- See the «WAVEFORM DATA TABLE #3»(/chevrolet/chevy-van-g3500/1985-1999/remont/testing-diagnostics/#fuel-injector-waveforms-43l-cpi-vin-w) for supporting data.
The Waveform Data Table is listed first. This table contains supporting information about the waveform illustration and should be used in conjunction with it.
The waveform illustration follows after the table.
Note. A description of the vehicle the waveform came from is not available.
| Application | Specification |
|---|---|
| Pattern Type | Voltage |
| Voltage Base | 20 Volts |
| Time Base | 2.5 Milliseconds |
| Oscilloscope Used | Unknown |
| Pattern Represents | Single Injector |
| Injector Driver Type | Current Controlled |
| Side of Circuit That Driver Switches | Ground |
| Injector On-Time Shown | 7.5 mS |
| Conditions | During Cranking At 50°F (10°C) |
| Cursors On-Screen | Yes |
| Cursors Are Measuring | Injector On-Time |
| Status | Known Good Pattern |
WAVEFORM DATA #3
Injector Waveform (Voltage) - Cursors Used - Known Good. Scheme 648
- (Scheme 649)for the waveform.
- See the «WAVEFORM DATA TABLE #4»(/chevrolet/chevy-van-g3500/1985-1999/remont/testing-diagnostics/#fuel-injector-waveforms-43l-cpi-vin-w) for supporting data.
The Waveform Data Table is listed first. This table contains supporting information about the waveform illustration and should be used in conjunction with it.
The waveform illustration follows after the table.
Note. A description of the vehicle the waveform came from is not available.
| Application | Specification |
|---|---|
| Pattern Type | Current |
| Current Base | 1 Amp |
| Time Base | 1 Millisecond |
| Oscilloscope Used | Unknown |
| Pattern Represents | Single Injector |
| Injector Driver Type | Current Controlled |
| Side of Circuit That Driver Switches | Ground |
| Injector On-Time Shown | N/A |
| Conditions | Unknown |
| Cursors On-Screen | No |
| Cursors Are Measuring | N/A |
| Status | Known Good Pattern |
WAVEFORM DATA #4
